Why is the UV index so low when the sun is still high on a very hot day?

Question

For example in Perth, WA today the UV was only “1 – Low” at 6pm, when the sun was still quite high in the sky. The temperature was still 34 degrees and you could really feel the sun’s heat.

How could you be at such low risk of sunburn under those conditions?

In: Planetary Science

Answer 1

Growing up I was told it was caused by the hole in the ozone layer above Australia.

Thankfully it’s a dry sun.
I went to IGA earlier to bask in the nights heat at 10pm or so; it was 30 degrees (Celsius).